I'm afraid with a Classified ad, there's no making of any amendment / change, once the item goes live.
To cancel the ad and relist in the correct category, you would still pay that listing fee, and pay again once the corrected listing goes live.
You could add perhaps the 2 listing fees to the starting price, if you wished to go ahead and cancel and relist ?
Or the vehicle stays as it is.
@boo2001blue
@boo2001blue